found the problem!

#4 Cylinder 0 compression


Modified by LSVTEC408 at 1:36 PM 11/8/2007

 

Do you have a wideband oxygen sensor installed in the vehicle ?
If not, you really should have one to see what is going on.

Also, is the vehicle throwing any codes ?

I have a feeling the wire tuck has something to do with your issue.
Check all of your ground signal & power wires again along with your resistor box wiring.

 

day 2 still nothing decide to pull out the plugs and recheck them their flooded with gas...i also did a test to see if there is spark and there is....The motor takes time to turn on and then ill just run super rich i start pulling spark plug wires while the car is running to see if the motor start sounding worser and it does with 1,2,3 cylinders but when i pull #4 spark plug wire it does not do anything to the engine...engine still runs the same without wire 4..weird..cause i check if there is spark and there is....will the computer be sending a screwed up firing order...i am clueless...i spend 4 hours trying to troubleshoot and nothing...

 

too rich , leaky injector?

 

do a compression / leakdown on the 4th cylinder since it sounds like that it isnt firing

 

since you did a wire tuck make sure the injector plugs are going to the right cylinders and they're working. other than that a compression check wouldn't hurt but i dont see why it would be a problem because it ran fine before

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ErrDizzle &raquo;</TD></TR><TR><TD CLASS="quote">since you did a wire tuck make sure the injector plugs are going to the right cylinders and they're working. other than that a compression check wouldn't hurt but i dont see why it would be a problem because it ran fine before</TD></TR></TABLE>
ya check that already and they are going to the same plugs

 

how does it idle? irratic? if so, try checking the tps sensor and iacv plugs. they look exactly alike and plug in alike. and could be plugged in the wrong sensors. could be the problem. just my opinion tho.


Modified by dc2crx at 7:54 PM 11/6/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dc2crx &raquo;</TD></TR><TR><TD CLASS="quote">how does it idle? irratic? if so, try checking the tps sensor and iacv plugs. they look exactly alike and plug in alike. and could be plugged in the wrong sensors. could be the problem. just my opinion tho.


Modified by dc2crx at 7:54 PM 11/6/2007</TD></TR></TABLE>
ya that was the first thing i checked and they were wired wrong at first but still teh same i even replaced both sensors just to see i didnt fried them or something still does the same...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC408 &raquo;</TD></TR><TR><TD CLASS="quote">
ya that was the first thing i checked and they were wired wrong at first but still teh same i even replaced both sensors just to see i didnt fried them or something still does the same...</TD></TR></TABLE> ic... the only other thing i could think of then is crank angle sensor, if anything else around the ignition source isnt damaged....

 

well i dont think it can be the crank sensor cause of the obd1 ecu not relooking for it, and im running MSD Ignition also..i swapped ignition from my friends car and still did the same....this is so clueless...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC408 &raquo;</TD></TR><TR><TD CLASS="quote">well i dont think it can be the crank sensor cause of the obd1 ecu not relooking for it, and im running MSD Ignition also..i swapped ignition from my friends car and still did the same....this is so clueless...</TD></TR></TABLE>ahh my bad forgot that its obd 1.... it is a head scratcher.....

 

i had this problem b4 acouple months back... but i cant remember wat it was... i checkd so many things, but i think it was the iacv that was the problem. but i know in your case that you didnt touch anything after you removed/ installed the motor.

Edit: back a couple post i said tps and iacv, i meant tps and map sensor. sheck those out. if u did disregard this.

 

well i swapped block to a stock gsr but that motor was running before..and im running 1 bar map sensor and that seems to be okay..im gonna recheck the iacv one more time tommorow....but since u said u had that problem and it was the iacv did u have a check engine light?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC408 &raquo;</TD></TR><TR><TD CLASS="quote">well i swapped block to a stock gsr but that motor was running before..and im running 1 bar map sensor and that seems to be okay..im gonna recheck the iacv one more time tommorow....but since u said u had that problem and it was the iacv did u have a check engine light?</TD></TR></TABLE>nope no cel, and car drove like ****, guzzled gas and bogged at certain rpm's. had a spare iacv swapped it out, and changed my spark plugs (because they fouled from running so rich) and it was fine. that was the one solution that really made a difference beside doing what you did and borrowing known working sensors and parts.

 

well gonna change plugs and gonna try to swap another iacv when i wake up...see if anything

 

I'm having the same exact problem on my H22. I'm completely stumped!

We first thought it was a wiring or ecu problem seeing that I have a P06 vtec ecu from phearable. However, when I took it to the tuner, his personal ecu that he uses to tune with also didn't work.

(I'm getting a check engine with the old ecu & also with the new one)
Pulled the codes:

IAT
ECT
Vtec Pressure switch

It runs with the old P13 ecu and stock injectors, but doesn't want to start all the time with the new p06 ecu and 880cc injectors. When it does start with the p06 & 880s, it runs super rich, smokes, and I have throttle response issues.

I'm at a lost here. Any help is appreciated.

 

Bump

 

my car doesnt even idle i tried EVERYTHING so the only thing left is changing the map

 

Going to perform a compression and leak down test see if the numbers are good...reason is motor runs the same if #4 spark plug wire is out do not know why but their is spark and fuel..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC408 &raquo;</TD></TR><TR><TD CLASS="quote">Going to perform a compression and leak down test see if the numbers are good...reason is motor runs the same if #4 spark plug wire is out do not know why but their is spark and fuel..</TD></TR></TABLE>

bump for an answer for Rigo. I think i have a compression tester if you need it.

 

problem found no compression on cyl#4

time to pull the head off

 

valves sound be bent or stuck open

 

ya it should be the exhaust valves just did a leak down and shows exhaust has leakage...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC408 &raquo;</TD></TR><TR><TD CLASS="quote">ya it should be the exhaust valves just did a leak down and shows exhaust has leakage...</TD></TR></TABLE>

weak, if you need some valves, i have spare ones.